CN115788439A - Uranium mining method for sandstone uranium ore - Google Patents
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Abstract
The invention relates to a uranium mining method for sandstone uranium ores. The method comprises the following steps: determining the distance between the liquid pumping well and the liquid injection well according to the depth of the stratum and the permeability of the stratum, and determining 4 perforation sections according to the thickness of the ore bed; one liquid pumping well and one liquid injection well correspond to 4 perforation sections; and each perforation section corresponds to the direction of the surrounding well; when the perforation section on the liquid pumping well is represented, the peripheral well is a liquid injection well, and when the perforation section on the liquid injection well is represented, the peripheral well is a liquid pumping well; acquiring the length of the perforation section, perforating, and performing fracturing construction on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section until fracturing in the direction of 4 perforation sections on any well is completed; injecting a leaching agent into the fracturing-finished injection well, and pumping a leaching solution out of the fracturing-finished pumping well; and treating the leachate to obtain a uranium product. The method improves the permeability, reduces the cost and improves the uranium leaching amount.
Description
Technical Field
The invention relates to the field of in-situ leaching uranium mining, in particular to a uranium mining method for sandstone uranium ores.
Background
In-situ leaching uranium mining has become the most important mining method for natural uranium in China. Due to the natural endowment of the sandstone uranium resources in China, the difficult mining conditions of low permeability, multilayer ore body superposition, small ratio of ore body thickness to sand body thickness, large ore body burial depth, high mineralization degree of underground water, uranium coal superposition and the like generally exist. Particularly, the low-permeability sandstone uranium ore has large resource quantity and is difficult to economically exploit. The effective means is adopted to dredge pores of the low-permeability sandstone uranium or reform the permeability of a certain range of ore beds in a near-wellbore area, so that the economic exploitation is a necessary trend.
Numerous permeation-enhancing technical studies are carried out on low-permeability sandstone uranium deposits. For example, by taking oil exploitation technology as a reference, permeability improvement technical researches such as acidification (CN 104533376B), hydraulic sand blasting (201511026941.3), ultrasonic waves (201810809145.4), surfactants, perforation and the like are carried out to improve the permeability of a near-wellbore zone and achieve some effects in practice. However, the methods have a small general action range, can only partially improve the original permeability, or relieve the permeability reduction and harm removal in the in-situ leaching uranium mining process, and cannot achieve the effects of improving permeability and greatly improving the original permeability.
The characteristics of low permeability sandstone uranium reservoirs determine that the reservoirs are difficult to economically extract and must be permeability-modified. In the same way, in the industries of low-permeability and ultra-low permeability ore deposit resources (which can be lower than 0.01 m/d), petroleum, shale gas, coal bed gas, hydraulic salt mining and the like, the reservoir transformation technology adopting fracturing is widely applied to industrial production, wherein the most widely applied technology is the hydraulic fracturing technology. The hydraulic fracturing injects fracturing fluid into a shaft through large displacement to fracture the stratum, so that the fracture is promoted to extend along the direction of the maximum principal stress to form a high-flow-guiding support fracture which is dozens of meters or even hundreds of meters, and the stratum permeability of the transformation area is improved.
However, in-situ leaching uranium mining is chemical mining, and the flow of solution and the diffusion of solute as well as the chemical reaction between leaching agent and mineral in the mining process are the coupling of a physical field and a chemical field. The long and large fissures of significant geometric dimensions in the above-mentioned industries can cause preferential flow of leaching solution, making it difficult to leach uranium ore resources in the non-preferential flow area.
Disclosure of Invention
The invention aims to provide a uranium mining method for sandstone uranium ores, which is used for greatly improving the permeability of an ore bed, increasing the pumping and injection liquid amount, accelerating the leaching speed and solving the problems of poor uranium leaching efficiency and low recovery rate of low-permeability sandstone uranium ores mined by fracturing long and large cracks with obvious geometric dimensions.
In order to achieve the purpose, the invention provides the following scheme:
a uranium mining method for sandstone uranium ores comprises the following steps:
determining the distance between the liquid pumping well and the liquid injection well according to the depth of the stratum and the permeability of the stratum, and determining 4 perforation sections according to the thickness of the ore bed; one liquid pumping well and one liquid injection well correspond to 4 perforation sections; and each perforation section corresponds to the direction of the surrounding well; when representing the perforation section on the liquid pumping well, the peripheral well is an injection well, and when representing the perforation section on the injection well, the peripheral well is a liquid pumping well; the distance between the liquid pumping well and the liquid injection well with the depth of 300 m-500 m is 30 m-50 m; the distance between the liquid pumping well and the liquid injection well which are 500-800 m deep is 35-60 m;
acquiring the length of the perforation section, perforating, performing fracturing construction on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section, and controlling the fracturing range to be 5-10 m in radial length through the discharge capacity and the fracturing liquid amount until the fracturing in the direction of 4 perforation sections on any well is completed;
injecting a leaching agent into the fracturing-finished injection well, and pumping a leaching solution out of the fracturing-finished pumping well;
and treating the leachate to obtain a uranium product.
Optionally, the length of the perforation section is 0.3 m-1.0 m; the interval between adjacent perforation sections is 0.3 m-1.0 m.
Optionally, the performing of fracturing construction on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section specifically includes:
according to the length of the perforation section, sleeving two packers with the upper and lower intervals longer than the perforation section on the casing; the packer is connected with a fracturing facility;
controlling the fracturing range through the discharge capacity and the fracturing fluid amount;
and based on the fracturing range, utilizing the packer to perform fracturing construction on the liquid pumping well and the liquid injection well from bottom to top.
Optionally, the obtaining of the length of the perforation section and perforation are performed, and then fracturing construction is performed on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section until fracturing is completed in the direction of 4 perforation sections on any well, and then the method further includes:
acquiring the liquid injection amount of the liquid injection well before fracturing, the liquid pumping amount of the liquid pumping well before fracturing, the liquid injection amount of the liquid injection well after fracturing and the liquid pumping amount of the liquid pumping well after fracturing;
comparing the injection amount of the injection well before fracturing with the injection amount of the injection well after fracturing to obtain an injection comparison result;
comparing the pumping liquid amount of the pumping liquid well before fracturing with the pumping liquid amount of the pumping liquid well after fracturing to obtain a pumping liquid comparison result;
evaluating the permeation increasing effect after fracturing is finished according to the injection liquid comparison result and the liquid extraction comparison result;
if the permeation enhancing effect is within a set permeation enhancing range, injecting the leaching agent into the fracturing-finished injection well, and pumping out the leaching solution from the fracturing-finished pumping well;
and if the permeation enhancing effect is not within the set permeation enhancing range, adjusting the length of the perforation section, and fracturing again.
Optionally, the leachate is treated to obtain a uranium product, and the method specifically includes:
adsorbing the leachate by using ion exchange adsorption resin to generate saturated resin and adsorption tail liquid;
leaching the saturated resin by using a leaching agent to obtain qualified uranium-containing liquid;
and precipitating the qualified uranium-containing liquid to obtain a uranium product.
Optionally, the ion exchange adsorption resin is used for adsorbing the leaching solution to generate saturated resin and adsorption tail liquid, and then the method further comprises:
and adding the leaching agent into the adsorption tail liquid, and injecting the adsorption tail liquid into an ore bed through the fracturing completed injection well again.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a uranium mining method for sandstone uranium ores, which is characterized in that 4 perforation sections are arranged on a liquid extraction well and a liquid injection well, seams are built around a shaft in a small range in a small-scale micro-fracturing mode, so that the dominant flow of a leaching liquid is avoided, the permeability is improved, the cost is reduced, and the mining is facilitated; the micro fracturing operation ensures the leaching effect and improves the uranium leaching amount; in addition, the invention adopts a simple well body structure and combines micro fracturing measures, thereby increasing the distance between the liquid pumping well and the liquid injection well and obviously reducing the drilling cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic of the effect of fracture radius on leach area;
fig. 2 is a flow chart of a uranium mining method for sandstone uranium ore provided by the invention;
FIG. 3 is a diagram of a design of a perforated section provided by the present invention;
fig. 4 is a schematic diagram of the fracturing effect provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a uranium mining method for a sandstone uranium ore deposit layer, which improves permeability, reduces cost, ensures leaching effect and improves uranium leaching amount.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Example one
FIG. 1 is a schematic diagram showing the influence of fracture radius on leaching area, and from the plane influence area of the fracture, the radial length of the fracture, namely the circumferential radius r, is between 5 and 10m, and the influence area S is only 78.5 to 314m 2 The interval L of the pumping and injection well is 30 to 60m, and the area is 1800 to 7200m 2 For the pumping and injecting unit, the area of the fracturing area is controlled within 10 percent, and the leaching rate of the fracturing area can be more than 70 percent in consideration of high reagent concentration and good leaching effect of the injection area.
Fig. 2 is a flow chart of the uranium mining method for sandstone uranium ore, and as shown in fig. 2, on the basis of the influence of the fracture radius on the leaching area, the invention provides the uranium mining method for sandstone uranium ore, which includes:
step 201: determining the distance between the liquid pumping well and the liquid injection well according to the depth of the stratum and the permeability of the stratum, and determining 4 perforation sections according to the thickness of the ore bed; one liquid pumping well and one liquid injection well correspond to 4 perforation sections; and each perforation section corresponds to the direction of the surrounding well; when the perforation section on the liquid pumping well is represented, the peripheral well is a liquid injection well, and when the perforation section on the liquid injection well is represented, the peripheral well is a liquid pumping well; the distance between the liquid pumping well and the liquid injection well with the depth of 300 m-500 m is 30 m-50 m; the distance between the liquid pumping well and the liquid injection well with the depth of 500 m-800 m is 35 m-60 m.
Step 202: and acquiring the length of the perforation section, perforating, and performing fracturing construction on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section until fracturing in the direction of 4 perforation sections on any well is completed.
The fracturing construction is carried out on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section, and the fracturing construction method specifically comprises the following steps: according to the length of the perforation section, sleeving two packers with the upper and lower intervals longer than the perforation section on the casing; the packer is connected with a fracturing facility; controlling the fracturing range through the discharge capacity and the fracturing fluid amount; and based on the fracturing range, utilizing the packer to perform fracturing construction on the liquid pumping well and the liquid injection well from bottom to top.
Dividing 4 perforation segments according to the thickness of the ore layer, wherein each perforation segment is 0.3-1.0 m corresponding to the direction of one peripheral well in four directions of south, east, west and north, and each perforation segment is 0.3-1.0 m long; the interval between adjacent perforation sections is 0.3 m-1.0m, as shown in figure 3, so that the sealing and the layered fracturing of the packer are ensured; drilling, casing, reverse grouting and perforating to form a well.
In practical application, according to the length of the perforation section, two packers with the upper and lower spacing longer than the perforation section by 0.1-0.5 m are sleeved on the casing. And (4) setting a packer, installing and connecting fracturing facilities, and performing fracturing construction from bottom to top. The fracturing range is controlled to be 5-10 m in radial length. And then the packer is unsealed, a layer is lifted, and the perforation section of the previous layer is fractured until the fracturing in 4 directions is completed, as shown in figure 4.
In practical application, after fracturing operation is completed, the seepage enhancement effect is evaluated and the design and construction quality is confirmed by comparing the change of the pumping liquid volume of the pumping well and the change of the injection liquid volume of the injection well before and after transformation.
Further, the acquiring the length of the perforation section and perforating, and then performing fracturing construction on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section until fracturing in the direction of 4 perforation sections on any well is completed further comprises: acquiring the liquid injection amount of the liquid injection well before fracturing, the liquid pumping amount of the liquid pumping well before fracturing, the liquid injection amount of the liquid injection well after fracturing and the liquid pumping amount of the liquid pumping well after fracturing; comparing the injection amount of the injection well before fracturing with the injection amount of the injection well after fracturing to obtain an injection comparison result; comparing the pumping liquid amount of the pumping liquid well before fracturing with the pumping liquid amount of the pumping liquid well after fracturing to obtain a pumping liquid comparison result; evaluating the permeation increasing effect after fracturing is finished according to the injection liquid comparison result and the liquid extraction comparison result; if the permeation enhancing effect is within a set permeation enhancing range, injecting the leaching agent into the fracturing-completed injection well, and pumping out the leaching solution from the fracturing-completed pumping well; and if the permeation enhancing effect is not within the set permeation enhancing range, adjusting the length of the perforation section, and fracturing again.
Step 203: and injecting a leaching agent into the fracturing-finished injection well, and pumping out a leaching solution from the fracturing-finished pumping well.
Step 204: and treating the leachate to obtain a uranium product.
In practical application, the step 204 specifically includes: adsorbing the leachate by using ion exchange adsorption resin to generate saturated resin and adsorption tail liquid; leaching the saturated resin by using a leaching agent to obtain qualified uranium-containing liquid; and precipitating the qualified uranium-containing liquid to obtain a uranium product.
The leachate is adsorbed by using ion exchange adsorption resin to generate saturated resin and adsorption tail liquid, and then the method further comprises the following steps: and adding the leaching agent into the adsorption tail liquid, injecting the adsorption tail liquid into an ore bed through the fracturing-finished injection well again, and circularly leaching until the target leaching rate is reached.
Example two
The depth of ore bed burial of a sandstone uranium mine is 400-450 m, the thickness of the ore bed is 3-5 m, and CO is adopted 2 +O 2 The method for modifying and mining the ore bed comprises the following steps:
the distance between pumping and injection wells is 40m; perforating in 4 sections, each section is 0.5-0.6 m long and corresponding to the direction of one peripheral well, and the interval between adjacent perforation sections is 0.3-0.5 m.
Drilling, casing, reverse grouting and perforating according to the drilling well-forming design.
Two packers with the upper and lower spacing of 0.8m-1.0m are sleeved on the casing pipe, so that the perforation section is positioned in the middle of the two packers. And (4) setting a packer, installing and connecting a fracturing facility, and performing fracturing construction from bottom to top. The fracturing range is controlled to be 5-10 m in radial length through the displacement and the fracturing fluid amount. And then the packer is unpacked, a layer is lifted, and perforation section fracturing of the previous layer is carried out until fracturing in 4 directions is completed.
After the fracturing operation is finished, the pumping amount of the pumping well is increased by 100-300%, and the injection amount of the injection well is increased by 300-500%.
Injection into injection well with increased permeabilityContaining O 2 And CO 2 The leaching agent of (2) for underground leaching; the oxygen concentration in the initial leaching agent is 400 mg/L-500 mg/L, and when the residual oxygen concentration in the leaching agent is about 10mg/L, the oxygen injection concentration is reduced to 200 mg/L-300 mg/L; when the leaching rate reaches 60-70%, the oxygen injection concentration is reduced to 50-150 mg/L until the leaching is finished; CO in the initial leaching agent 2 The addition amount is 500 mg/L-1000 mg/L, and CO is added when the concentration of the bicarbonate radical is increased to 1.0g/L 2 The adding amount is 100 mg/L-500 mg/L to adjust the pH value to 6.5-7.5; the liquid injection pressure of the leaching agent is controlled to be 1.0-1.6 MPa 2 And CO 2 The adding pressure is 0.1MPa to 0.2MPa higher than the injection pressure of the leaching agent.
When the uranium concentration of the leachate is more than 10mg/L, adsorbing by using ion exchange adsorption resin, and adsorbing by using macroporous styrene strong-base anion exchange resin to obtain saturated resin and adsorption tail solution; specifically, two pressure-bearing adsorption towers connected in series are used for carrying out downstream pressure-bearing ion exchange adsorption on uranium, wherein the pressure in the first adsorption tower is 0.1-0.3 MPa, and the pressure in the second adsorption tower is less than 0.1MPa; when the resin is saturated, 15 g/L-20 g/L NaHCO is used 3 Eluting the saturated resin with an eluting agent of NaCl of 80-120 g/L to obtain qualified liquid; adjusting the pH of the qualified solution to 12.0-13.0 by using sodium hydroxide, precipitating at normal temperature for 6-12 h, and taking Na as the lower layer 2 U 2 O 7 And precipitating the slurry, and performing filter pressing to obtain a uranium product.
Adding CO into the absorption tail liquid obtained by treating the leaching solution in a centralized control room 2 And O 2 And after the concentration is reached, injecting the mixture into the ore bed through the liquid injection well again, and performing circulating leaching until the leaching rate reaches the target.
EXAMPLE III
The sandstone uranium mine ore bed buries deeply 550 m-650 m, the thickness of the ore bed is 5-8 m, the acid leaching process is adopted for in-situ leaching exploitation, and the method for modifying and exploiting the ore bed is as follows:
the distance between pumping and injection wells is 50-55 m; perforating in 4 sections, wherein the length of each perforating section is 1.0-1.2 m, each section corresponds to the direction of a peripheral well, and the interval of each direction is 0.4-0.8 m.
Drilling, casing, reverse grouting and perforating according to the drilling well design.
Two packers with the upper and lower intervals of 1.4m are sleeved on the sleeve. And (4) setting a packer, installing and connecting a fracturing facility, and performing fracturing construction from bottom to top. The fracturing range is controlled to be 5-10 m in radial length through the discharge capacity and the fracturing fluid amount. And then, deblocking the packer, lifting one layer, and fracturing the perforation section of the previous layer until fracturing in 4 directions is completed.
After fracturing operation is finished, the pumping capacity of the pumping well is improved by 150-300%, and the injection capacity of the injection well is improved by 200-400%.
Injecting a leaching agent containing sulfuric acid into the permeation-enhanced injection well for underground leaching; the concentration of sulfuric acid in the initial leaching agent is 1-5 g/L; when the pH value in the leaching solution is reduced to 2-3, the concentration of sulfuric acid is increased to 5-10 g/L, and meanwhile, hydrogen peroxide is added to increase the potential to 400-550 mV until the leaching is finished; the injection pressure of the leaching agent is controlled to be 0.5-1.2 MPa.
When the uranium concentration of the leachate is more than 10mg/L, adsorbing by using ion exchange adsorption resin, and adsorbing by using macroporous styrene strong-base anion exchange resin to obtain saturated resin and adsorption tail solution; specifically, two pressure-bearing adsorption towers connected in series are adopted to carry out downstream pressure-bearing ion exchange adsorption of uranium, wherein the pressure in the first adsorption tower is 0.1-0.3 MPa, and the pressure in the second adsorption tower is less than 0.1MPa; when the resin is saturated, 50-90 g/L NaNO is used 3 Leaching the saturated resin by using a leaching agent to obtain qualified liquid; adjusting the pH of the qualified solution to 12.0-13.0 by using sodium hydroxide, precipitating at normal temperature for 6-12 h, and obtaining Na as a lower layer 2 U 2 O 7 And precipitating the slurry, and performing filter pressing to obtain a uranium product.
And adding sulfuric acid and hydrogen peroxide into the adsorption tail liquid obtained by treating the leachate to the value in the centralized control chamber, injecting the adsorption tail liquid into the ore bed through the liquid injection well again, and performing circulating leaching until the leaching reaches the target.
The invention remarkably improves the permeability by forming seams in a small range around the shaft in a small-scale micro-fracturing mode, and simultaneously reduces the operation cost and improves the liquid pumping and injecting amount; the invention adopts a simple well body structure and combines micro fracturing measures, thereby increasing the distance between pumping and injection wells and obviously reducing the drilling cost and investment; and the leaching effect is ensured through micro fracturing operation.
In conclusion, the method can greatly improve the permeability of the ore bed, improve the liquid pumping and injecting amount, accelerate the leaching speed and realize the economic exploitation of the low-permeability sandstone uranium ores.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A uranium mining method for sandstone uranium ores is characterized by comprising the following steps:
determining the distance between the liquid pumping well and the liquid injection well according to the depth of the stratum and the permeability of the stratum, and determining 4 perforation sections according to the thickness of the ore bed; one liquid pumping well and one liquid injection well correspond to 4 perforation sections; and each perforation section corresponds to the direction of the surrounding well; when representing the perforation section on the liquid pumping well, the peripheral well is an injection well, and when representing the perforation section on the injection well, the peripheral well is a liquid pumping well; the distance between the liquid pumping well and the liquid injection well which are 300-500 m deep is 30-50 m; the distance between the liquid pumping well and the liquid injection well with the depth of 500-800 m is 35-60 m;
acquiring the length of the perforation section, perforating, performing fracturing construction on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section, and controlling the fracturing range to be 5-10 m in radial length through the discharge capacity and the fracturing liquid amount until fracturing is completed in the direction of 4 perforation sections on any well;
injecting a leaching agent into the fracturing-finished injection well, and pumping leaching liquid out of the fracturing-finished pumping well;
and treating the leachate to obtain a uranium product.
2. A method for uranium mining from sandstone uranium ores according to claim 1, wherein the length of the perforation segment is 0.3m to 1.0m; the interval between adjacent perforation sections is 0.3 m-1.0 m.
3. The method for uranium mining for sandstone uranium ore deposit according to claim 1, wherein the fracturing construction is performed on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation section, and specifically comprises:
according to the length of the perforation section, sleeving two packers with the upper and lower intervals longer than the perforation section on the casing; the packer is connected with a fracturing facility;
controlling the fracturing range through the discharge capacity and the fracturing fluid amount;
and based on the fracturing range, utilizing the packer to perform fracturing construction on the liquid pumping well and the liquid injection well from bottom to top.
4. A uranium mining method for a sandstone uranium ore deposit according to claim 1, wherein the length of the perforation segment is obtained, perforation is performed, fracturing construction is performed on the liquid pumping well and the liquid injection well from bottom to top according to the length of the perforation segment until fracturing in the direction of 4 perforation segments on any one well is completed, and then the method further comprises:
acquiring the liquid injection amount of the liquid injection well before fracturing, the liquid pumping amount of the liquid pumping well before fracturing, the liquid injection amount of the liquid injection well after fracturing and the liquid pumping amount of the liquid pumping well after fracturing;
comparing the injection amount of the injection well before the fracturing and the injection amount of the injection well after the fracturing is finished to obtain an injection comparison result;
comparing the pumping liquid amount of the pumping liquid well before fracturing and the pumping liquid amount of the pumping liquid well after fracturing to obtain a pumping liquid comparison result;
evaluating the permeation increasing effect after fracturing is finished according to the injection liquid comparison result and the liquid extraction comparison result;
if the permeation enhancing effect is within a set permeation enhancing range, injecting the leaching agent into the fracturing-finished injection well, and pumping out the leaching solution from the fracturing-finished pumping well;
and if the permeation enhancing effect is not within the set permeation enhancing range, adjusting the length of the perforation section, and fracturing again.
5. The method for uranium mining for a sandstone uranium ore deposit according to claim 1, wherein the leachate is processed to obtain a uranium product, and specifically comprises:
adsorbing the leachate by using ion exchange adsorption resin to generate saturated resin and adsorption tail liquid;
leaching the saturated resin by using a leaching agent to obtain qualified uranium-containing liquid;
and precipitating the qualified uranium-containing liquid to obtain a uranium product.
6. A uranium mining method for a sandstone uranium ore deposit according to claim 5, wherein the leachate is adsorbed by using an ion exchange adsorption resin to generate a saturated resin and an adsorption tail solution, and then the method further comprises:
and adding the leaching agent into the adsorption tail liquid, and injecting the adsorption tail liquid into an ore bed through the fracturing completed injection well again.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116333699A (en) * | 2023-03-16 | 2023-06-27 | 中南大学 | Well filling material for in-situ leaching uranium extraction well and application method |
| CN117846561A (en) * | 2024-01-15 | 2024-04-09 | 中国矿业大学 | Coal and uranium collaborative mining method based on separation layer grouting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116333699A (en) * | 2023-03-16 | 2023-06-27 | 中南大学 | Well filling material for in-situ leaching uranium extraction well and application method |
| CN116333699B (en) * | 2023-03-16 | 2024-03-29 | 中南大学 | Well filling material for in-situ leaching uranium extraction well and application method |
| CN117846561A (en) * | 2024-01-15 | 2024-04-09 | 中国矿业大学 | Coal and uranium collaborative mining method based on separation layer grouting |
| CN117846561B (en) * | 2024-01-15 | 2024-06-07 | 中国矿业大学 | Coal and uranium collaborative mining method based on separation layer grouting |
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